I have had horses all my life and i have 6 horses now. I dont have a problem with them being eaten - its been dont in different countries for ages so its now new. I would hope they are being killed humainly but from what I have seen of the slaughter of alot of meat animals its not that humane at all.
If you want to eat it - eat it, If not then dont. Simple really. But dont teaten the life of a man because he chooses to cook / eat it. eveyone has choices - same for everything in life.